Experimental Study of Fouling Performance of Air Conditioning System with Microchannel Heat Exchanger

Key

2140

Conference Year

2014

Authors

Bo Xu, Shanghai Jiao Tong University, China, People's Republic ofFollow
Junye Shi, Shanghai Jiao Tong University, China, People's Republic ofFollow
Ying Wang, Shanghai Jiao Tong University, China, People's Republic of
Jiangping Chen, Shanghai Jiao Tong University, China, People's Republic of
Feng Li, SICHUAN CHANGHONG ELECTRIC CO.,LTD, China, People's Republic of
Dong Li, SICHUAN CHANGHONG ELECTRIC CO.,LTD, China, People's Republic of

Keywords

Fouling, Microchannel heat exchanger, Perfromance

Abstract

Microchannel heat exchanger (MCHX) has many advantages compared with traditional heat exchanger. The research and application of it also develop fast in recent years. However, in the domestic air conditioning field, it has not been widely used yet. One of the obstacles is the dust fouling of the outside condenser. The affect of dust fouling problem on air conditioning systems with louver fin and wavy fin was researched in this article. The results show the fouling problem of the MCHX can cause drastically performance degradation of the system, the cooling capacity decreased by 23% and 17.2%, the energy consumption increased by 52.5% and 28.4%, and COP decreased by 49.5% and 35.6% for air condition systems with louver fin and wavy fin MCHX respectively after they run for 3 months in the factory environment. Based on this situation, a fan blowback control strategy was introduced into the air conditioning system. After adding the control strategy, the cooling capacity only decreased by 5.5% and 2%, the energy consumption increased by 7.8% and 2.3%, and COP decreased by 12.3% and 4.3% for the systems with louver fin and wavy fin MCHX respectively 3 months later.